US EPA Research Triangle Park Memorandum: Analysis of Contribution Thresholds for Use in Clean Air Act Section 110(a)(2)(D)(i)(I) Interstate Transport State Implementation Plan Submissions for the 2015 Ozone National Ambient Air Quality Standards August 31, 2018 pdf

Briefing for States on Alpine Modeling of Ozone Transport, July 9, 2018 pdf

EPA Memorandum entitled “Information on the Interstate Transport State Implementation Plan Submissions for the 2015 Ozone National Ambient Air quality Standards Under the Clean Air Act Section 110(a)(2)(D)(i)(I)” dated March 27, 2018 pdf

EPA Memorandum entitled “Supplemental Information on the Interstate Transport State Implementation Plan Submissions for the 2008 Ozone National Ambient Air Quality Standards under the Clean Air Act Section 110(a)(2)(D)(i)(I)” dated October 27, 2017 pdf

"Improving Air Quality in the Washington/Baltimore Corridor - A Critical Role for Transportation Planners", Tad Aburn, Air Director Maryland Department of the Environment, TAC Meeting, July 17, 2014 pptx pdf

Impacts of Updated Design Values on Determinations of Contributions to Nonattainment and Maintenance in Cross State Air Pollution Rule prepared by Alpine Geophysics October 2011 revised January 2012Impacts of Updated DV Memorandum

Attainment Modeling and Design Value Analyses for 8-hr Ozone and PM2.5 Attainment Demonstrations in the Midwestern and Northeastern United States prepared by Alpine Geophysics September 28, 2010Attainment Modeling and Design Value Analyses